How to Paint a Beam in an Accelerator
In a ring accelerator, particles race around in circles like cars on a roundabout. Normally, when new particles are injected, they take random spots on that roundabout — the beam becomes 'fluffy.' In a new experiment at the SNS accelerator, the eigenpainting method was applied: particles were injected so that they only entered one 'lane'—a single oscillation mode…